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Finding the Fourth Proportional to 390,275.01, 585,451.67 and 105,969.87

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Solution

The fourth proportional to 390,275.01, 585,451.67 and 105,969.87 is: 158,965.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,275.01 : 585,451.67 = 105,969.87 : x
  2. Step 2: Convert to fraction form
    390,275.01/585,451.67 = 105,969.87/x
  3. Step 3: Cross multiply
    390,275.01x = 585,451.67 × 105,969.87
  4. Step 4: Simplify right side
    390,275.01x = 62,040,236,831.33
  5. Step 5: Solve for x
    x = 62,040,236,831.33/390,275.01
  6. Step 6: Final answer
    x = 158,965.44

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.